Lease-binding database full, no empty entries found

[bharat_gole]

Hi,

we have facing issue every day as Lease-binding database full in Ruckus ICX 7450 switch.

this is reason so many our client not able to connect with network due to this issue. when i manually enter the command in the switch for flush the entire database-  L3_SW_ICX7450#clear ip dhcp-server binding * then they has connected.

we have configured total 20 VLAN.

Conf-

ip dhcp-server pool vlan2
 excluded-address 10.2.0.1 10.2.0.50
 lease 0 10 0
 network 10.2.0.0 255.255.248.0
 option  3 ip 10.2.0.1  
 option  6 ip 8.8.8.8  8.8.4.4  
 deploy
!

can you please help me how to solve this issue permanently.

Logs- for your reference.. 

Feb 10 18:41:59:I:DHCPS: verified client requested address 10.10.10.69 in lease binding, updating entry 
Feb 10 18:41:59:I:DHCPS: Received APR-PING reply from client 10.10.10.69 
Feb 10 18:41:59:I:DHCPS: Failed to allocate new lease entry 
Feb 10 18:41:59:I:DHCPS: Lease-binding database full, no empty entries found 
Feb 10 18:41:56:I:DHCPS: Lease-binding database full, no empty entries found 
Feb 10 18:41:56:I:DHCPS: Received APR-PING reply from client 10.10.10.69 
Feb 10 18:41:55:I:DHCPS: Failed to allocate new lease entry 
Feb 10 18:41:55:I:DHCPS: Lease-binding database full, no empty entries found 
Feb 10 18:41:55:I:DHCPS: Failed to allocate new lease entry 
Feb 10 18:41:55:I:DHCPS: Lease-binding database full, no empty entries found 
Feb 10 18:41:54:I:DHCPS: Failed to allocate new lease entry 
Feb 10 18:41:54:I:DHCPS: Lease-binding database full, no empty entries found 
Feb 10 18:41:52:I:DHCPS: Lease-binding database full, no empty entries found 
Feb 10 18:41:48:I:DHCPS: sending ACK message to client 10.10.10.97 
Feb 10 18:41:48:I:DHCPS: verified client requested address 10.10.10.97 in lease binding, updating entry 
Feb 10 18:41:47:I:DHCPS: No ARP-PING reply from client 10.10.10.97 
Feb 10 18:41:46:I:DHCPS: Lease-binding database full, no empty entries found 
Feb 10 18:41:40:I:DHCPS: sending ACK message to client 10.2.0.96 
Feb 10 18:41:38:I:DHCPS: sending ACK message to client 10.2.0.52 
Feb 10 18:41:38:I:DHCPS: verified client requested address 10.2.0.52 in lease binding, updating entry 
Feb 10 18:41:38:I:DHCPS: No ARP-PING reply from client 10.2.0.52 
Feb 10 18:41:38:I:DHCPS: Lease-binding database full, no empty entries found

[bharat_gole]

Hi Ben,

thanks for response.

you said ICX Switch have limits up to 500 users if you crossed the limit then this error will coming, right .?

But, today I had a completely different experience.

See - when the error occurred. I have checked the arp entry.

we found - we still get this error, while our 327 client connected only.

Quest_L3_SW_ICX7450#sh log
Syslog logging: enabled ( 0 messages dropped, 0 flushes, 148 overruns)
    Buffer logging: level ACDMEINW, 4000 messages logged
    level code: A=alert C=critical D=debugging M=emergency E=error
                I=informational N=notification W=warning

Static Log Buffer:
Feb 11 07:45:17:I:System: Stack unit 1   Power supply 2  is up  

Dynamic Log Buffer (4000 lines):
Mar 22 17:49:21:I:DHCPS: Failed to allocate new lease entry 
Mar 22 17:49:21:I:DHCPS: Lease-binding database full, no empty entries found 
Mar 22 17:49:21:I:DHCPS: Writing entries to Flash  
Mar 22 17:49:17:I:DHCPS: Failed to allocate new lease entry 
Mar 22 17:49:17:I:DHCPS: Lease-binding database full, no empty entries found 
Mar 22 17:49:17:I:DHCPS: Failed to allocate new lease entry 

Quest_L3_SW_ICX7450#sh arp
Total number of ARP entries: 327
Entries in default routing instance:
No.   IP Address       MAC Address    Type     Age Port               Status
1     10.2.0.212       e803.9a8c.1544 Dynamic  0    1/2/1             Valid 
2     10.2.0.214       0045.e235.c81f Dynamic  0    1/2/1             Valid 
3     10.2.0.215       b052.16c3.0bc9 Dynamic  0    1/2/1             Valid 
4     10.2.0.216       bc54.2f32.1112 Dynamic  0    1/2/1             Valid 
5     10.2.0.221       88e9.fe59.2b94 Dynamic  2    1/2/1             Valid 
6     10.2.0.223       742b.62f3.ebc9 Dynamic  0    1/1/2             Valid 
7     10.2.0.225       046c.59d6.bf23 Dynamic  0    1/2/1             Valid 

[BenBeck]

Hey Bharat, 

Those two numbers (ARP and dhcp bindings) may not match depending on your setup. They are not always a 1-to-1 thing. 

[bharat_gole]

@ben_beck yes you was right.

now the released the 9.0.00 firmware on the 27th July 2021
 and the IP DHCP Binding Scalability have upto 3000 in that firmware.

Thank for your valuable support.